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jcmd - JVM Diagnostic Tool Command
This section describes what is 'jcmd' (Java jcmd Tool) - is a command line tool to run diagnostic commands against a given JVM on the local machine.
2022-10-01, 463🔥, 0💬

Archived: Downloading and Installing JDK 1.5
This section describes how to download and install Java SE (JDK) 1.5.0 on a Windows XP system.
2022-10-01, 460🔥, 0💬

java.util.DecimalFormat.parse() - Parsing Strings to Number Objects
This section provides a tutorial example on how to use the java.util.DecimalFormat.parse( )method to parse or convert numeric strings to number objects.
2022-10-01, 456🔥, 0💬

Converting uXXXX Sequences Back with "-reverse" Option
This section provides a tutorial example on how to \uXXXX Unicode code sequences back to a native encoding like UTF-8 with the 'native2ascii -encoding utf-8 -reverse' command.
2022-10-01, 452🔥, 0💬

jhsdb - The Java HotSpot Debugger
This chapter provides tutorial notes on 'jhsdb', the Java HotSpot Debugger. Topics include 'jhsdb' command options; starting HotSpot Debugger in GUI or command line mode; inspecting JVM threads; viewing JVM stack memory.
2022-10-01, 451🔥, 0💬

System.setProperty() - Setting Your Own Properties
This section provides a tutorial example on how to modify system properties provided by the JVM, and set your own properties into the system property map.
2018-05-15, 449🔥, 2💬

Converting java.util.GregorianCalendar to java.time.ZonedDateTime
This section provides a tutorial example how to migrate Java code from the old java.util.GregorianCalendar class to the new java.time.ZonedDateTime class.
2022-10-01, 444🔥, 0💬

Importing Classes Defined in Unnamed Packages
This section provides a tutorial example on how to import classes defined in an unnamed package - done in the same as importing classed defined in named packages with JDK 1.3.1. But it is not allowed with JDK 1.4.1.
2021-08-07, 443🔥, 2💬

💬 2021-08-03 Herong: bruce, you need to have Hello.class is in the classpath.

💬 2021-07-31 bruce: D:\javadu>echo %path% C:\Program Files\Java\jdk1.3\bin D:\javadu>javac ImportingHello.java ImportingHello.java:1: cannot resolve...

Archived: JDK 1.6 keytool - keystore File Tool
This section describes all commands supported in JDK 1.6 'keytool' tool to manage certificates stored in 'keystore' files.
2022-10-01, 441🔥, 0💬

"jpackage -t msi" - Package for Windows
This section provides a tutorial example on how to use 'jpackage -t msi' command to generate a binary distribution package from Java application JAR file in *.msi format for Windows computers. But 'jpackage' requires a third-party tool, WiX, to work.
2022-10-01, 440🔥, 0💬

Check JDK Version on CentOS
This section provides a tutorial on how to check the version information of the installed JDK packages on CentOS systems.
2022-01-09, 436🔥, 0💬

"javap -c -private" - Disassembling Java Bytecode Class
This section provides a tutorial example of how to disassemble Java bytecodes with 'javap -c -private' command. The disassembled codes are JVM execution instructions.
2022-10-01, 435🔥, 0💬

Partial Date and Time Objects and Classes
This section provides a tutorial example on how to use Date-Time classes that represents partial date and time objects like java.time.LocalDate, java.time.LocalDate, etc.
2022-10-01, 432🔥, 0💬

Compiling Hello.java - My First Java Program
This section provides a tutorial example on how to compile a Java program using the 'javac' tool without any options.
2023-07-26, 429🔥, 1💬

Searching for Instances with OQL Statements
This section provides a tutorial example on how to write an OQL (Object Query Language) query statement to search for object instances with specific conditions.
2022-10-01, 421🔥, 0💬

Archived Tutorials
This chapter contains some outdated tutorial notes and example codes from previous versions of this book.
2022-10-01, 421🔥, 0💬

Integer Data Types
This section describes value ranges and storage space sizes of integer data types: byte, short, int, long and char.
2016-02-15, 417🔥, 1💬

💬 2016-02-15 Merit Campus: You can clear many of your doubts regarding data types in Core Java through Merit Campus, visit: http://java.meritcampus.com/cor...

jdeps - The Java Class Dependency Analyzer
This chapter provides tutorial notes on 'jdeps', the Java Class Dependency Analyzer. Topics include 'jdeps' command options; showing package or class level dependencies of a given class or jar file; showing package or class level reverse dependencies of a given Java module.
2022-10-01, 416🔥, 0💬

Listing Java Tools in JDK
This section provides a list of Java tools included in the Oracle JDK package for Windows systems.
2022-10-01, 415🔥, 0💬

jmc - Java Mission Control
This chapter provides tutorial notes on 'jmc' Java Mission Control tool. Topics include introduction of jmc; launching jmc; viewing JVM dashboard; browsing MBean objects; managing monitoring triggers.
2022-10-01, 404🔥, 0💬

Using JAR Files in Java Class Paths
This section provides a tutorial example on how to use JAR files in class paths during Java compilation and execution time.
2022-10-01, 401🔥, 0💬

Literal Formats for Integers
This section describes 4 literal formats for integer values: decimal, hex, octal and binary integer literals. The default integer literal data type is 'int'.
2022-10-01, 399🔥, 0💬

jconsole - Connecting to a Remote JMX Agent
This section provides a tutorial example on how to run 'jconsole' to connect to a JMX agent running on a remote machine, and how to see memory usage detail information.
2022-10-01, 395🔥, 0💬

Converting Secret Keys to and from Byte Arrays
This section provides a quick introduction of the SecretKeySpec class and the KeySpec interface. They can be used to convert secret keys into byte arrays to store them in external files.
2024-02-03, 392🔥, 1💬

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